Boat



Aug. 27, 1929. A. B; NIHLROS BOAT Filed April 1927 2 Sheets-Shae;

llllllllllrlll INVENTOR.

A TTORNE Y.

A ugg 27, 1929. A. B. NIHLROS BOAT Filed April '7, 1927 2 Sheets-Sheet;

l I u H I I 1 I I I I I I I I I a y I INVENTOR.

A TTORNEY Patented Aug. 27, 1929.

UNITED STATES ANDREW B. NIHLROS, O11 MURRAY, UTAH.

BOAT.

Application filed April 7,

This invention relates to a boat with a removable keel, and has for one of its ob3ects,

to provide a boat having a removable keel upon which all motive power for driving the 5 boat is placed.

Another object of this invention, is to provide a boat with a flat bottom in such a manner that the keel can be removed and replaced at will.

Another object of this invention is to provide a boat with a keel to carry all the motive power of the boat on its deck in such a manner that when the keel is removed the motive power will be removed also. In this manner delays caused in repairing the motive power of the boat will be eliminated.

l/Vith these and other objects in view the invention consists of certain novel features of construction as hereinafter fully described and claimed.

In the accompanying drawing forming a part of this specification and in which corresponding parts are denoted by like reference characters, is illustrated the preferred form of embodiment of the invention capable of carrying the same into practical operation, it being understood that the invention is not necessarily limited thereto, as various changes in shape proportions and general assemblage of the parts may be resort-ed to without departing from the principles of the invention or sacrificing any of its advantages, and the right is therefore reserved for making all the changes and modifications which will fairly fall within the scope of the invention and claims made therefor.

Referring to the drawing:

Figure 1 represents a plan view of a boat with all inner parts removed to show keel in bottom thereof.

Fig. 2 is a side view of Fig. 1 the side partly cut away to show keel in place and in section.

Fig. 8 is a view showing the center frame of the boat the keel therebetween and in section.

The reference character A denotes the hull of the boat, which may be of ordinary form and construction, or other preferable construction. The lower part of the boat which rests upon the water is provided with an open ing B into which is placed an adjustable and removable keel 1.

Around the hull of the boat is placed a shock-absorber G which is spaced away from the hull A by means of springs'2, and is held 1927. Serial No. 181,723.

in place by bolts 3 the ends thereof being placed into sockets 4 secured to cross braces D.

Tn the front of the boat and within the hull A is placed a jar absorber 5 having a spring 6 at its inner end.

The reference character 1 denotes the keel having a hollow space 6 between its walls to form a tank in which is placed water for the lowering of the keel and the water is removed for the raising of the keel. To lower the keel valve 4-2 is opened to let water into the keel and when the desired amount of water is entered the valve is closed. Water may be pumped into the keel by the pump 12 when desired, the water being drawn through the pipe 40 and discharged into the keel by the pump through pipe 41. To draw the water out of the keel the pump 12 is reversed which draws the water up through pipe 41 and discharges it out of pipe 40. A valve 48 on the deck of the keel must be opened in letting water into or drawing it out of the keel, this valve must be closed when the desired amount of water is in the keel, thus making the keel air tight as well as water tight.

Within the channel F and on the outer face of the wall 7 is placed the motive power for driving the boat, which comprises engines 8, a shaft 9 mounted in bearings 10. The ends of shaft 9 pass through each end of the keel and a propeller 11 is secured thereon.

When the keel has been placed into the opening of the hull the locks 13 are turned back so each leg 13 will fit on each side of the uprights G in such a manner that they will raise or lower with the up and down movement of the hull or keel, and when the keel is to be removed the locks are turned back onto the deck of the keel as shown by dotted lines 70. The lock is madein a U shape and hinged to the upper edge of the keel and swings on the hinge in the rocking of the boat. is the side walls of the opening in which the keel enters.

In guiding the boat rudder H is operated in the usual manner with any of the standard makes of control.

The power is transferred from the engine to pulleys 14 of shaft 9 to operate the shaft and propellers.

In the raising and lowering of the keel locks 13 move on uprights G and the locks are removed from the upri hts when the keel is to be removed from the boat.

Having thus described the invention what placed Within said channel, said propeller 15 I claim as new and desire to secure by Letshaft extending lengthwise of said channel ters Patent, is: the ends thereof projecting through the ends 1. A boat comprising a hull having an of said channel and having propellers there- 5 opening therein, a removable keel placed on, all substantially as set forth.

within said opening, said keel comprising a 3. A boat having a removable keel com- 20 tank in which water is placed for the lowerprising a tank having a channel formed ing thereof and air is placed for the raising thereon in which is placed a motor and a thereof and means for securing said keel driving shaft for driving propellers of said 1 within said opening, all substantially as set boat, said propellers being connected to the forth. outer ends of said shaft all substantially as 25 2. A boat having a removable keel coinset forth.

prising a tank having a channel formed thereon, a motor for drlving a propeller shaft ANDREW B. N IHLROS. 

